Shade-roller lock.



w. c. MOORS.

SHADE ROLLER LOCK.

APPLICATION FILED FEB. 24, 1911,.

1,242,362. Patented Oct. 19,1917.

' osricn WALTER C. MODES, OF OWENSBORO, KENTUCKY, ASSIGNOR F ONE-HALF TO WARD P.

PEDLEY, 0F OWENSBORO, KENTUCKY.

SHADE-ROLLER LOCK.

Specification of Letters Patent.

Application filed February 24, 1917. Serial No. 150,759.

To all whom it may concern:

Be it known that I, WALTER C. Moons,

, ticularly to pawl and ratchet locks therefor,

it being the object of the invention to provide a novel and improved device of that character.

The object of the invention is the provision of novel yetextremely simple and effective means for locking the shade roller against winding up the shade, when said roller is permitted to rotate, above a certain velocity, said shade roller being locked by the usual or ordinary device when the roller is rotated to wind up the shade below a certain velocity. In other words, with the present device, the roller must rotate above a certain limit of low speed and below another limit of high speed, for otherwise the roller will be locked against rotation for winding up the shade. Thus, the roller will be locked if the operator is careless or neglectful in attempting to wind up the shade too fast. With the present arrangement, the destruction of the shade by a too fast winding thereof upon the roller is eliminated, but the shade can be wound up by a slow, steady movement within certain limits, and if the movement of the shade is too slow or too fast, it will be locked.

Another object of the invention is the provision of such improvements which can be readily incorporated in prevailing shade rollers and brackets.

With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts, and in the details of construction,hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, can be made within the scope of what is claimed, without departing from the spirit of the invention.

The invention is illustrated in the accompanying drawing, wherein I Figure 1 is a perspective view of the device, illustrating one end portion of the shade roller, with the bracket and roller separated. f

Fig. 2 is a cross section through the parts when assembled, and illustrating the roller locked by an excessive velocity thereof in winding up the shade.

Fig. 3 is a view similar to Fig. 2 illustrating a modification.

In the drawing, there is illustrated an ordinary ferrule 1 fitted upon the end of the shade roller 2, and providing an annular flange 3. The terminal 4 of the spring spindle projects as usual from within the ferrule 1, and pawls or dogs 5 arewpivoted within the ferrule 1 and are surrounded by the flange 3, the terminal or spindle 4 having notches 6 for the engagement of the pawls to lock the roller against winding up the shade unless the roller is rotated above a certain velocity, in which event, the centrifugal force will throw the pawls outwardly away from the notches 6 to enable the roller to be rotated by the spring (not shown) to wind up the shade. The device just described is of ordinary construction, and an extensive description or detail illustration thereof is not necessary.

The numeral 7 designates an ordinary bracket provided with a slot 8 forfnon-rotatably receiving the terminal 4 of the spring spindle, whereby the spindle is prevented from rotating, while the roller can rotate, there being an ordinary spring between the spindle and the roller for winding up the shade, as is well known.

Coming to the present improvements, the same embodies a collar 9 carried by the bracket 7 around the slot 8 for rotatably receiving the ferrule 1 of the shade roller, and this collar 9 is provided, preferably at the top thereof, with a slot or aperture 10. Another feature of the invention resides in the provision of notches or recesses 11 in the flange 3 permitting the pawls 5 to swing outwardly through said notches by centrifugal force against the inner cylindrical surface of the collar 9. a

In operation, when the shade is unwound, the pawls 5 will not interfere with the rotatation of the roller, and when the unwinding of the shade is stopped, one of the pawls Patented Oct. 9, 1917.

will drop into engagement with the upper sli htly, as usual, and is then raised ,with su cient speed so that the pawls 5 will be thrown away from the notches 6 by centrifugal force, but if the shade is permitted to move too fast, the pawls 5 will be thrown against the collar 9 with such force, that one of the pawls will move into the aperture or slot 10, as seen in Fig. 2, thereby locking the roller against rotation to wind up the shade. When the shade is permitted to wind up between certain limits, as above indicated, the centrifugal force acting upon the pawls, is not suflicient to move the pawls into the aperture 10, and the pawls can readily move across the aperture 10 during the normal rotation of the roller. Care must therefore be taken in winding up the shade, as the roller will be locked if the operator makes an attempt to wind up the shade too fast, or lets go of the shade.

' Fig. 3 illustrates the present improvements incorporated in a different form of lock, the end member 2 of the roller which rotates within the collar 9 having the radial recesses 5 in which paw'ls 5 in the form of balls roll for locking the roller. The recesses 5 are extended to the periphery of the member 2, as at 11, to enable the pawls 5' to be moved into engagement with the aperture 10, as seen in Fig. 3, for locking messes the roller should it rotate above a certain velocity. I Having thus described the invention, what 18 clanned as new is A shade roller construction embodying a bracket having a spindle receiving aperture, and a collar surrounding said aperture and provided with an aperture in its upper portion, a roller having one terminal disposed rotatably within said collar and provided with a non-rotatable spindle engageable in the first mentioned aperture, and a pawl carried bysaid terminal of the roller within the collar and movable between said collar and spindle to engage the spindle when the roller is rotated in one direction below a certain velocity and prevent further'movement of the roller in said direction, and to move along the interior of said collar and engage in the second mentioned aperture when the roller. is rotated in said direction above a certain velocity to stop further movement in said direction.

In testimony that I claim the foregoing as my own, I have hereto affixed my signature in the presence of two witnesses.

WALTER C. MOORS.

Witnesses:

JAMES W. GILBERT, ORA O. TIoHENoR. 

